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Pukeiti Rhododendron Trust Inc.
NEWSLETTER
Rhododendrons in a Rainforest
S E P T E M B E R 2 0 2 4 V O L U M E 7 1 N O . 2
www.pukeiti.org.nz
Meeting epiphytes and other
aerial plants at Pukeiti
Heather Robson led an informative walk to sites in
the rainforest to observe the epiphytes and other
climbing plants. There are many types and the
rainfall at Pukeiti is ideal and they festoon and
cover the trunks of many of the taller trees. True
epiphytes germinate on
Flood Control Scheme Damage Repair Works
Author: C. Vicars, Rivers Manager
Approved by: D Harrison, Director - Operations
Document: TRCID-1492626864-956
Purpose
1. The purpose of this memorandum is to seek approval for flood damage repairs to existing flood
protection assets damaged during the 3-4 July 2025 rainfall events.
Executive summary
2. We own and operate the Ōkato Scheme, the Lower Waiwhakaiho Flood Control Scheme, and the Lower
Waitara Flood Control
structures;
viii) The locations of all specific points of discharge from the work area to the environment; and,
ix) Any other relevant site information.
d) Construction timetable for the erosion and sediment control works and the bulk earthworks proposed;
e) Maintenance, monitoring and reporting procedures;
f) Rainfall response and contingency measures including procedures to minimise adverse effects in the
event of extreme rainfall events and/or the failure of any key erosion and sediment
Operations and Regulatory Committee Agenda
discharges may be allowed, if the dairy farm is in a high rainfall area and provision
of adequate storage is impractical. The discharge of treated farm dairy effluent to surface water may
be authorised as a contingency, when land disposal area is unsuitable for effluent disposal. This
option needs to be discussed with Council Staff before applying.
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Page 6 of 14
07/25 - #TRCID-1750395856-193
6) Iwi Consultation
The Council encourages engagement with tangata whenua as part
monitoring year, with irrigation
commencing in late October and concluding in mid-April across the region. Rainfall recorded at the
Council’s monitoring locations over the summer irrigation period ranged between 109% and 163% of
historical mean values. Due to the higher rainfall, irrigation demand was lower with a total water usage of
4,063 ML during the 2022-2023 season. This was lower than the preceding 2021-2022 monitoring year,
which recorded 6,960 ML.
The Council carried out compliance
presently under
significant pressure. While there may be an increase in demand as people look to move away from less
secure surface water sources, this is not expected to place groundwater under significant pressure in the
short to medium term.
As expected, monitored groundwater sites display fluctuations in water level as a result of seasonal
variations in rainfall recharge. The magnitude of these changes varies considerably by site, ranging from
a few millimetres up to several metres. The …
practices;
c. access to and from the site for vehicles and machinery;
d. the staging of each area and how the staging relates to the erosion and sediment
control devices;
e. the design criteria and dimensions of all key erosion and sediment control
structures;
f. works monitoring, including routine monitoring, rainfall triggers and significant
rainfall event contingencies;
g. identification of key roles and responsibilities for ESCP implementation;
h. spill contingency planning; and
i.
monitoring 9 November 2023 21
Table 6 Surface water monitoring 25 January 2023 23
Table 7 Surface water monitoring 22 March 2024 25
Table 8 Surface water monitoring 31 May 2024 27
Table 9 Metals in surface water and WTS discharge 29
Table 10 Biomonitoring sites in the Haehanga Stream Catchment and comparable reference site 31
Table 11 Taxa, MCI and SQMCI results for Haehanga Stream Catchment and reference site for current
and previous surveys. 33
Table 12 Rainfall and irrigation volume in the